A DESCRIPTION OF THE PROBLEM :
Example code :
BUFFER_UNDERFLOW:
       int netSize = engine.getSession().getPacketBufferSize();
       // Resize buffer if needed.
       if (netSize > dst.capacity()) { //**********************maybe should be :if (netSize > src.capacity()) {
           ByteBuffer b = ByteBuffer.allocate(netSize);
           src.flip();
           b.put(src);
           src = b;
       }
       // Obtain more inbound network data for src,
       // then retry the operation.
       break;
   // other cases: CLOSED, OK.

FREQUENCY : always